Speed-controlled brake device.



W. V. TURNERJ SPEED comnouan BRAKE upvacs.

APPLICATION FILED MAR. 30. 1515. 1 5 95? Batentezl Fb.12, 1918.

2 SHEETSSHEET I.

INVENTOR W. V. TURNER. SPEED CONTROLLED BRAKE DEVICE. I v 'APPLICATION FILED MAR. 30. 1915- 1 ,255 Patented Feb. 12,1918.

2 SHEETS-SHEET 2.

INVENTOR 7 WW! E a 1w: 3': a %M air V011, .aumha reservolr,

4, and through ipe, (,'to

the brake pipe, 8.

GEWOOD, PENNSYLVANIA, ASSIGNOR TO T WEBTING- 0F WIIJHEBDING, PENNSYLVIA, A,QUEPQMATION SPEED-COIiTTROLLED BRAKE DEVICE.

To all whom it may concern:

Be it known that I, WALTER V. TURNER, a citizen of the United States, residing at the borough of Edgewood, in the county of Allegheny and State of Pennsylvania, have.

invented a certain-new and usefullmprovement in Speed-Controlled Brake Devices, of I which improvement the following is a specification.

This invention relates to that type of flu1d ressure brake apparatus which is governed by the speed of the vehicle, the object being to provide an improved speed controlled valve means for supplying fluid from the main or other reservoir, or independent source, to the. brake cylinder when the speed exceeds a predetermined maximum rate, and v to automatically release the fluid from the brake cylinder when the speed'has been reduced, to or below a certain rate; This improvement is preferably employed in connection with the usual automatic air brake system, and a double check valve device is used for the purpose of closing the escape from the brake cylinder through the exhaust port of the automatic valve or through the exhaust port of the speed controlled valve means, when the application of the brakes is being made by either the one or the other of said valves.

In the accompanying drawings: Figure 1 is a diagram illustratin a speed controlled brake equipment as app ied to a double ended car, and embodying my improvement; and Fig. 2, a section showing the improved valve means in .detail.

As shown in Fig. 1, the vehicle may be equipped with the usual standard automatic rake system comprising a main reser- 5, train brake pipe, 8, triple valve, 13, 14, brake cylinder, 15, and bra e valves, 9, at either end of the car, connected to main reservoir pipe, 6, and to valve means, 10, is connected to main reservoir ipe, 6, and is adapted to supply air there om to the double check valve device,

the brake cylinder. This supp y of air also operates the circuit breaker, 19, to open the electric circult. The triple valve,.13, is connected'by pipe, 3, with the governed by a speed controlled mechanism,

specification of Letters Patent.

reservoir pipe, The speed controlled to. apply the brakes.

prevent escape of air double check valve. R electro-magnet, 12,,tl1'e circuit to whichis means, 10

As shown more fully in Fig. 2, this valve means comprises a supply valve, 11, and an exhaust valve, 16,'both actuated by the core of the electro-magnet, 12, and a spring, 17. The'port,23, leads to the cylinder, 19, con taining piston 22, attached to the switch, 20, for controlling a supply circuit to the motors, and port, 18, communicates with the chamber of the double checkvvalve, 4. This port, 18, port1on o the cylinder in order to insure the movement of the piston, 22, before. communication from the supply is open to the brake cylinder.

Any suitable form of speed controlled mechanism may be employed, that indicated in Fig. 1, comprising a generator, Gr, driven by the axle, 1, and connected in circuit with relay switch, R, normally closed and controlling a circuit from the battery, B, to the magnet, 12. The valve, 11, is normally held closed by the energized magnet, 12, against the fluid pressure acting beneath said valve, and the spring, 17. The switch, 20, is normally held closed by spring, 21, acting on piston, 22.

With the parts in their normal positions and the system charged with air under pressure in the usual manner, the automatic brake system may be operated in the ordinary way, to apply and release the brakes whenever desired, during which operation the double check valve, 4, remains seated against the port, 18. When the circuit to the electro-magnet, 12, is, opened by the speed controlled relay switch, R, the magnet is ,denergized, thus allowing the supply valve, 11, to open and the exhaust valve, 16, to close by the action of the fluid pressure and the spring, 17. Air from the main 6, then flows-through port, 23, to the piston,"22,' raisingthe same to open the switch, 20, and then passing through port, 18, and pipe, 7, tothe brake cylinder The double check valve now remains seated against the pipe, 3, to through the exhaust of the triple valve. When the s dis reduced tothe desired rate,the re ay switch,

is again-closed, and the magnet, 12, is then energized to close the valve, 11, and open the valve, 16, whereby the air fi'om.

v Patented Feb, t2, jihad. Application filed Mar-ch80, 191%. Serial lt'o. 13,0139.

Freferably leads from the upper at each particular zone.

switch, 20, and the the brake cylinder isreleascd to the atmosphere. As the pressure acting on thepiston,

22, diminishes, the spring, 21, operates to move the piston downward and close the power circuit. If the circuit of the axle driven generator is to be made efiective at certain zones along the track, trip devices, T, may be provided for engagmg spective zones, whereby the cu'cmt may be closed with the proper amount of resistance for the desired maximum speed permissible .Having now described my invention, what I claim as new and desire to secure by Letters Patent is: I

1. In a fluid pressure brake apparatus, the combination with an automatic train pipe and valve device operated by variations in train pipe pressure for controlling a supply of fluid to and its release from the brake cylinder, of a reservoir, a valve also controlling asupply of fluid fromsaidreservofi I .magnet, and a double check valve for closing certain ramps located at the 'remama? the brake cylinder, an electro-magnet for operating said valve, 9. speed controlled 1 mechanism for govermng the current to said communication from one source when flu is being supplied from the other.

2. In a fluid ressure brake apparatus, the combination w1th an automatic train pipe and valve device operated by variations in train ipe ressure for controllin a su pl offluid to and its release from the biiak e cylinder, of a reservoir, a valve means also controlling a supply of fluid from said-reservoir to the brake cylinder a device 0 erated by the fluid from said va ve means or cut? ting off the supply of current to the motors, and a speed controlled mechanism for governing the operation of said valve means.

. WALTER V. TURNER. I Witnesses:

A. M. Gamn'rs, S. W. 

